title: Interleukin 1beta-511T gene (IL1beta) polymorphism is correlated with gastric cancer in the Caucasian population: results from a meta-analysis.
abstract: The polymorphisms of interleukin-1beta (IL1beta) genes have been controversially correlated with gastric cancer risk. We examined all the available published studies through a meta-analysis approach. Twenty-one studies assessing the correlation between IL1beta gene polymorphisms and gastric cancer were examined: 15 studies evaluated the role of IL1beta-511T, 12 of IL1beta-31T and 6 investigated both polymorphisms. The IL1beta-511T polymorphism was correlated with an increased risk of developing gastric cancer in the global population (OR of 1.23, 95% CI 1.09-1.37, P=0.0002). The analysis of the population stratified for Caucasian and Asian ethnicities showed that the IL1beta-511T polymorphism was correlated with a statistically significant increased risk of gastric cancer in the Caucasian (OR of 1.56, 95% CI 1.32-1.84, P<0.00001), but not in the Asian population (OR of 1, 95% CI 0.85-1.16, P=0.95). An analysis of patients with the IL1beta-31T genotype did not show an increased risk of developing gastric cancer either on the overall or stratified population. The present data partially agree with the results of the two recently published meta-analyses. Our findings confirm the correlation between the IL1beta-511T allele polymorphism and gastric cancer risk in the overall population. However, this correlation is not statistically significant in the Asian, but is strongly correlated in the Caucasian subgroup. The present analysis considered a more copious sample size of cases after taking into account all the studies published recently by searching the 'PubMed' and 'MEDLINE' databases until July 2007. Hence, the present study contributes to clarify the controversial results on IL1beta polymorphisms and gastric cancer risk correlation evidencing the importance of ethnicity in the generation of the IL1beta polymorphism analysis.
authors.affiliation: C.I.R., University Campus Bio-Medico, Rome, Italy.
authors.forename: Bruno
authors.initials: B
authors.lastname: Vincenzi
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Patti
authors.forename: Sara
authors.initials: S
authors.lastname: Galluzzo
authors.forename: Francesco
authors.initials: F
authors.lastname: Pantano
authors.forename: Olga
authors.initials: O
authors.lastname: Venditti
authors.forename: Daniele
authors.initials: D
authors.lastname: Santini
authors.forename: Annamaria
authors.initials: A
authors.lastname: Ruzzo
authors.forename: Gaia
authors.initials: G
authors.lastname: Schiavon
authors.forename: Michele
authors.initials: M
authors.lastname: Caraglia
authors.forename: Monica
authors.initials: M
authors.lastname: Marra
authors.forename: Francesco
authors.initials: F
authors.lastname: Graziano
authors.forename: Giuseppe
authors.initials: G
authors.lastname: Tonini
mesh_terms: D020022:Genetic Predisposition to Disease / Q000208:ethnology*; D006801:Humans; D053583:Interleukin-1beta / Q000235:genetics*; D011110:Polymorphism, Genetic; D013274:Stomach Neoplasms / Q000208:ethnology* / Q000235:genetics*; D044465:White People
chemical_list: C508585:IL1B protein, human; D053583:Interleukin-1beta